Data/hora: 04/06/2024 09:16:48

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 28/12/2004
Data da última atualização: | 30/05/2018
Autoria: | ALVES, V. M. C.; PARENTONI, S. N.; VASCONCELLOS, C. A.; BAHIA FILHO, A. F. C.; PITTA, G. V. E.; SCHAFFERT, R. E.
Afiliação: | VERA MARIA CARVALHO ALVES, CNPMS; SIDNEY NETTO PARENTONI, CNPMS; ROBERT EUGENE SCHAFFERT, CNPMS.
Título: | Mechanisms of phosphorus efficiency in maize.
Ano de publicação: | 2001
Fonte/Imprenta: | In: HORST, W.J.; SCHENK, M.K.; BURKERT, A.; CLAASSEN, N.; FLESSA, H.; FROMMER, W.B.; GOLDBACH, H.; OLFS, H.-W.; ROMHELD, V.; SATTELMACHER, B.; SCHMIDHALTER, U.; SCHUBERT, S.; WIREN, N.V.; WITTENMAYER, L. (Ed.). Plant nutrition; food security and sustainability of agro-ecosystems through basic and applied research. Dordrecht: Kluwer Academic Publishers, 2001. p. 566-567.
Idioma: | Inglês
Conteúdo: | An experiment was conducted on 12 maize hybrids to study the processes involved in screening for P efficiency in nutrient solutions. Four P concentrations (0.3, 0.9, 2.7 and 5.4 mg/litre) were applied to the nutrient solution 20 days after transplanting. In related experiments, the effect of P stress on the morphological and physiological root characteristics were studied. The seed P level and the total dry matter and shoot dry matter were significantly and positively correlated at 0.3, 0.9 and 2.7 mg P/litre. The best treatment to evaluate changes in total root length under P stress was that of 6 days of P omission which significantly increased the root length of 3 of the P efficient hybrids. The omission of P in nutrient solution significantly increased the maximum rate of P absorption of 6 hybrids after 3 days of omission and in 5 genotypes after 6 days of omission.
Palavras-Chave: | Maize; Mineral uptake.
Thesagro: | Stress.
Thesaurus Nal: | hybrids; hydroponics; nutrient solutions; nutrient uptake; phosphorus; roots; seeds; shoots; soilless culture.
Categoria do assunto: | --
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (17442-1) - UPC - PL - DD -  -  -  - DIS